Shuttle propelling mechanism



H. HOEBER SHUTTLE PROPELLING MECHANISM June 12, 1951 2 Sheets$heet 1 Filed July 50, 1947 Deceased Barbara 0,.Dayand INVENTOR.

ATTORNEYS.

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- I illiam T/Eeacfiecuars Filed July 50, 1947 2 Sheets-Sheet 2 INVENTOR. l-rarola fioeber-fleceased a/a 0- m-Day a I 7- 860a! i'xe aa/o/s m w 5 5 @w 9 w ATTORNEYS,

Patented June 12, 1951 SHUTTLE PROPELLING MECHANISM Harold Hoeber, deceased, late of South Dartmouth, Mass., by Barbara 0. W. Day and William "1. Read, executors, Dartmouth, Mass, assignors, by mesne assignments, to Hoosac Mills Corporation, Boston, Mass., a corporation of Massachusetts Application July 30, 1947, Serial No. 764,850

4 Claims.

This invention relates to a loom and more particularly to the propelling of the shuttle across the loom.

If a loom is operated at high speeds, the movement of the shuttle across the loom is extremely important. It has been found that the speed at which a, loom may operate is governed largely by the efficiency of guiding and propulsion of the shuttle back and forth across the loom both from the standpoint of cost of repairs and upkeep of the loom. The control of the picker stick is important, and various controls for the picker stick have been provided. In some cases, the picker stick has been held down by a spring so that it will not jump upwardly as it is rocked back and forth. This has not been satisfactory. Some more positive means is desired, and in Patent No. 2,413,629 of December 31, 1946, one such more positive means of accomplishing this result has been provided, but, in the structure of this patent, a special pivotal mounting must be resorted to for the lower end of the picker stick.

One of the objects of this invention is to provide a positive means of guiding the picker stick in its swinging movement by utilizing a usual parallel at the lower end of the picker stick for pivoting it and by using a. more simplified guide than that described in Patent No. 2,413,629 for guiding the picker stick.

Another object of this invention is to provide a guiding means for the picker stick to cause the picker to have its desired straight-line motion, which consists in a limiting of the upward movement of the picker stick at a point adjacent to the upper end of the picker stick while limiting the downward movement of the picker stick at a location adjacent the lower end of the picker stick.

Another object of this invention is to provide a guide arrangement which will reduce the friction along the guiding surfaces to a minimum.

With these and other objects in view, the invention consists of certain novel features of construction as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

Fig. 1 is an elevational view of a fragmental portion of the loom illustrating the picker stick and picker in certain relative positions which they assume when the shuttle is boxed;

Fig. 2 is a sectional view through the lay and showing the upper guide for the picker stick as lower end of the stick;

Fig. 3 is a sectional view through the projection on the picker stick and the guiding plate which is attached to the lay beam;

Fig. 4 is an exploded perspective view of the mounting of the parts which are attached to the lay beam and the projection which is mounted upon the picker stick.

In proceeding with this invention, the picker stick is mounted in the usual manner by means of a parallel motion at its lower end, and there is mounted upon the lay beam a plate having a lower cam surface which will engage the upper edge of a projection on the stick to prevent the stick from rising and the shoe lifting from the parallel upon which it rocks,.thus governing the picker in the desired straight-line motion for propelling the shuttleacross the loom. The projection on the stick consists of a block which is pivotally mounted thereon and which will have a sufficient extent of surface so as to be well guided by the under cam surface of the plate which is attached to the lay beam. By the use of the cam surface at the upper end of the picker stick a much flatter curve and one which is more nearly rectilinear may be provided and thus there will be a reduction of friction of the parts which slide along it.

With reference to the drawings, there is provided a lay designated generally [0 having a shuttle box I I at each of its opposite ends. The lay beam l2 which forms the raceway and bottom of the shuttle box, is rockably mounted by means of the lay sword l2 upon the rock shaft H! which is journaled in the framework M in a usual manner. A bracket I5, which provides the parallel I6, is secured to this rock shaft by some suitable means such as the set screw I"! so as to rock back and forth with it and provide a surface along which the parallel shoe l8 rocks for causing the picker stick Hi to which this shoe is attached to move its picker 20 at its upper end in a straight-line motion for propelling the shuttle 2! across the loom.

The usual lug strap 30 is attached to the arm 3| to be actuated by the cam 32 in a usual manner. The usual check strap 22 encircles the stick l9 and is mounted for frictioning in a bracket 23 (see Fig. 4) which has portions 24 and 25 extending downwardly from it across which the check strap frictions. This bracket has arms 26 and 21 which receive the bolt 28 and which, in turn, supports the pin 29 which also serves as a frictioning means for the check strap 22.

A projection 35 is secured to the picker stick l9 by means of a headed bolt 3'6 (see Fig. 3) with its head 31 engaging the square block 38 (see Fig. 5) and extending through it and through the stick [9 where it is secured by means of the nut 39 which is threaded onto the bolt against the washer 40. A shoulder and washer prevent the block being drawn tight on the stick. This projection 38 will rock upon the bolt 36 to present its upper surface 4| against the plate which guides it. The upper guide or plate 42 is shown in perspective in Fig. 4 and is provided with a pair of arms 43 and 44 which are adjustably secured to the arms 45 and 46 by reason of the slots 41 in these arms and the openings 48 in the arms 43 and 44 with bolts 50 extending through these openings. The under surface of the guide or plate 42 is designated 49 (Fig. 3) and engages the upper surface 4| of the block 38 and thus as the stick [9 swings about its parallel motion with the block 38 engaging the under surface of the plate 42, the stick cannot rise away from the parallel H5 at any point along its movement, while, by reason of the parallel shoe rocking on the parallel l6, the stick cannot move downwardly, and thus the stick is prevented from undue movement lengthwise of itself and a control is provided so that the picker 20 may be caused to travel in a straight-line path in driving the shuttle 2| across the loom. This lower surface 49 may be adjusted by bolts 50 and openings 4! and 48 as occasion may require that the proper elevation of the picker may be had at all points of its movement.

What is claimed is:

1. In a shuttle propelling mechanism for a loom having a rockshaft and a lay beam, a picker stick, a picker thereon adjacent one end, a parallel attached to said rockshaft and a shoe attached to said stick and rockable on said parallel to limit the downward movement of said stick, and guide means located adjacent the picker end of the picker stick below the picker and the lay beam to limit the upward movement of the picker stick whereby said stick is guided in its swinging movement adjacent its opposite ends, said shoe and guide means being cooperatively shaped to efiect a straight line movement of the picker.

2. In a shuttle propelling mechanism for a loom having a rockshaft and a lay beam, a picker stick, a picker thereon adjacent one end, a parallel attached to said rockshaft and a shoe attached to said stick and rockable on said parallel to limit the downward movement of said stick, and guide means located adjacent the picker end of the picker stick below the picker and the lay beam to limit the upward movement of the picker stick comprising a projection on said stick and a guide surface attached to said lay beam to engage the upper edge of said projection, the surface of said shoe engaging said parallel and the guide surface on said lay beam being cooperatively shaped to effect a straight line movement of said picker.

3. In a shuttle propelling mechanism as in claim 2 wherein said guide surface is a plate presenting a cam surface.

4. In a shuttle propelling mechanism as in claim 3 wherein said plate is adjustable on said lay beam.

BARBARA O. W. DAY, WILLIAM T. READ, Ewecutm's of the Estate of Harold Hoeber, De-

ceased.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 775,890 Boisvert Nov. 22, 1904 2,413,629 Hoeber Dec. 31, 1946 

